Bead-rolling machine for plastic articles.



J. W. DENMEAD.

BEAD ROLLING MACHINE r011 PLASTIC ARTICLES.

APPLICATION FILED DEC. 9, 1912.

Patented Mar. 24, 1914.

2 SHEETS-SHEET 1.

W R Q m .QR

p R. M Q W WQ H la i mi J. W. DENMEAD.

BEAD ROLLING MACHINE FOR PLASTIC ARTICLES.

APPLICATION FILED DEC. 9, 1912.

1,091,123, Patented Mar.24, 1914.

2 SHEETS-SHEET 2.

48 27 A? Fig. 7

STATES... PATENT OFFICE.

Jenn w. DE'NMEAD, or AKRON, OHIO.

BEAD-ROLLING- MACHINE FOR PLASTIlZC. ARTICLES.

Specification of Letters Patent.

Patented Mar. 24, 1914.

Application ine'a December 9, 1912. Serial No. 735,813.

T 0 all whom it may concern: I

--Be it known that I, JOHN ,DENMEAD, a citizen of the United States, residing at Akron, in the county of Summit and State of Ohio, have invented. new and useful Improvements in Bead-Rolling-Machines for Plastic Articles, of which the following is a specification.

This invention relates to machines for perfect and rough and until reinforced by a bead is a source of weakness, and hence, this invention contemplates means for trimming, if necessary, the neck or open end of the article and subsequently rolling up the same for forming a bead'forstrengthening the article and improving its general'finished' appearance.

With the foregoingand other. objects in view, the invention consists in the novel construction, combination and arrangement of parts constituting the invention to be hereinafter specifically described andillustrated' in the accompanyingdrawings which form a part hereof wherein is shown the preferred embodiment of the invention, but it is to be understood that changes, variations and modifications can be resorted to which come within the scope of the claims hereunto appended.

In the drawin sin which similar reference numerals tin icate like parts in the 'dif-' ferent figures, Figure 1, is an end elevation of the device; Fig. 2, is a side elevation; Fig. 3, is a plan; Figs. 4 5 and 6, are side elevations of details ofthe mechanism employed; and, Fig. 7 is a transverse sectional view of the devlce shown in Fig. 5 on line X thereof.

' Referring to the drawings in detail, the

device embodies a supporting frame consisting of end members 1 and 2 suitably space apart and secured on a suitably supportin medium such as a floor.

At t e upper end of the member 2 are a pair of longltudinally-aperturedbosses or lugs 3 constituting supports formechanism to be later described. At the upper ends of the arms of the member 1 are a similar pair of centrally-apertured lugs 4. Mounted in the apertured lugs 3 and +1: and secured against rotation are a pair of parallel rods 5 and 6, c nstitutingWays for a slidable carriage, to be later described. Integral with and extending upwardlyfrom the lugs 41 are housngs 7 supporting bearings. 8 and 9 in which 1s mounted a rotatable shaft 10, bearing a cone-pulley 11 over one member of which runs a belt 12 for rotating the shaft 10.

' Either formed integrally with the inner end of the shaft 10 or secured thereto is a chuck or hub 13 in which is a comically-formed reces's 14 (see Fig. 4). Adapted to be frictlonally mounted in the recess 14 is a spindle 15 having a frusto-conically-formed end 16.

The larger end of the conical portion 16 is provided with an integral hub or collar 17 Extending from the collar 17 is an integral shaft 18. Secured on or formed integral with the shaft 18 is a lug 19 to which is secured a spring 20 the free end of which is provided with a detent 21 for constituting a lock to be later described.

Adapted to be slid-ably mounted on the shaft 18 is a bushing 22.constituting a formholdingchuck and provided at its outer end with a face-plate 23 provided with apertures 24 to which is secured by hold-fast devices,.o. r otherwise, a form 26 on which is mounted a nursing-nipple 27 constituting the article used to illustrate the application of this invention. The inner end of the bushing 22 is conically-formed at 28 and the bushing is provided with one or more apertures 29. In order to secure the bushing 22 on the shaft 18 temporarily to compel its' revolution in unison with the rotation of the shaft, the bushing is slid longitudinally on the'shaft 18 and the conical portion 28 forces the spring 20 and detent 21 outwardly and is rotated sufiiciently to bring the detent 21 into registration with the aper-- ture 29 causing the detent 21 to engage therein.

. It will be noted that one face of the detent v side wall of the opening 29, the bushing 22 will be rotated in unison therewith, and if it is desired to removeythe bushing and the form-bearing member, the bushing 22 is given a partial rotation forwardly, that is to say in the direction of rotation of the shaft 18 causing the inclined face ofthe detent 21 to engage the side wall of the opening 28 which raises the detent 21 out of t e opening 29, thereby permittin it to be drawn longitudinally from the sh I t 18, thus permitting another bushing wit-h a formbearing member to be substituted therefor.

The rotation of the shaft 18 and the for1nthe article 27 and rolling up the bead thereon are accomplished, and this carriage embodies a pair of longitudinally-extending members 29 and 30 arranged in parallelism and each centrally apertured to be slidable on the bars 5 and 6. The members 29 and 30 are connected by cross-bars 31. Preferably formed integral with the member 29 is a bracket 32 on which is mounted a motor 33 provided with an armature shaft 34 usually revolving in the neighborhood of fifteen to eighteen hundred revolutions per minute.

Mounted on the armature shaft .is an eccentric 35 to the strap of which is pivotally mounted an ear 36 at the end of a longitudinally-shiftableshaft 37 mounted in a bearing 38 on the upper end of a bracket 39 extending upwardly from the member 29. It will be apparent that as the motor revolves the shaft 37 will be alternately shifted or vibrated back and forth in its bearing 38. Secured on the shaft 37 between a pair of fixed collars 40 is the pivotal end of a lever 41 which is bent at right angles at 42 and provided at its outer end with a handle 43. The handle 43 bears a parting-blade 44 which is preferably of some substance such as ivory with a wedge-shaped formation in cross-section. The inner end of the shaft 34 is provided with a universal joint 45' to which is connected an arm 46 bearing a roller 47 preferably, although not necessarily, covered with-a layer 0 corrugated rubber. The universal-joint 45 permits the arm to be raised or lowered or turned sidewise at the will of the operator.

' Mounted on the bearing 9 on the member lis an arm 48 supporting at its outer end thereon is easily acan apertured head 49 in which is mounted a fixed rod 50 provided with a plurality of apertures or recesses 51. Mounted in a pair of the recesses 51 are a pair of upright guides 52 for a purpose to be later described,

one of which bears a supportin hook 53. In practice, the two guides 52 Wlll be posi tioned on opposite sides of the central transverse line where the tools, to be later described, are arranged to engage the article 27, but by providing a plurality of apertures 51- the longitudinal position of the guides 52 may be varied to suit the requirements of the work to which the device is to arm 58, the inner end of whicl1bears a circular cutting knife 59, positioned immediately below the center of the shaft 10 and the arm 58 is provided with an operating handle 60. The weight of the knife 59 is arranged to overbalance the arm 60 and normally hold the knife '59 in its lower or inoperative position. A pair of adjustable collars 61 are provided on the rod 6 for limiting the longitudinal movement of the tool-bearing-carriag.

The tool-bearing carriage is shifted on the ways 5 and 6 in one direction by means of a weight 62 to which is connected a flexible member 63 running over a pulley 64 and attached to a lug 65 on the carriage. The

' function of this counter weight is to normally shift the carriage to the left in Fig. 2.

and :this shifting movement is regulated through the medium of one of the fixed collars 61. In order to shift the tool-bearing carriage to the right in Fig. 2 there-is provided on one of the cross-bars 31 a lug 66 to which is connected a flexible member 67 running over a pulley 68 mounted. on :1 shaft 69 supported by a bracket 70 on the member2. The flexible member also runs around a'lower pulley 71 on a shaft72 supported by brackets 73 to a pulley 74 suitably supported below the tool-bearing carriage. Positioned below the tool-bearing carriage is a pedal 75 to the inner end of which is secured the flexible member 67.

In long experience in the manufacture of articles of this character in which the rolling up and formation of the bead by hand has heretofore been the customary practice, it has been found that no matter how carefully the bead is formed, unless pressed and the various spirally-wound layers of the wall of the article when rolled up to form a bead are-adherent an opening or space occurs between the layers which 'do not adhere to each other and in which air is confined which expands during the subsequent curing of the rubber sufiiciently to blowthe bead apart or break it or otherwise render it imperfect, so much so as to make the article commercially deficient and unmarketable. With this end in view, I provide a roller adapted to run on the face of the bead after its formation for pressing the various spiral lay-- ers together, to 1I'0I1 out the wrinkles, to exelude air and air-bubbles, and to impart a perfect shape to the bead. The surface of the roller is of any cross section desired and there is preferably placed on the arm 43 a rocking-lever 76 preferably fulcrumed at 7'7 and bearing on its inner end a roller; 78 which can be forced downwardly into engagement with the bead-duringthe rotation of the article by raising the outer end of the lever 76 after the parting-knife 44 has performed its function and the lei er 43 has been slightly raised to clear the article.

The operation of the device is as follows: The goods are usually made by dipping forms repeatedly in a bath until the required thickness is obtained for the article.

It frequently happens that the upper or open end of the dipped article is uneven and rough, and of course, is of the same thickness as the balance of the article. In order to smooth the upper end of the article and provide a strength-giving bead thereon, the forms 26 on which the articles are made, are secured to the face plates 23 of the bushings 22. After the formation of the article has been accomplished the bushings 22 are successively slipped onto the shaft 18 and locked there through the mechanism hereinhefore described, and this usually takes place with the shaft 10 running constantly. The to0l-bearing carriage will, under ordinary circumstances, be to the left in its operative position and the operator depresses the handle of the arm 58 bearing the knife 59 causing the latter to engage the upper open neck of the article 27 to trim it, making a cut therein at a desired point. A release of the handle 60 causes the knife 59,,to fall by gravity out of engagement'with the article. The. operator th njrocks the lever 43 downwardlyso as to bring the parting bladei-t" into the cut made by the knife and as the armature shaft 34 is revolved it causes a vibratory motion of the blade -14 in the cut made by the knife during the revolution of the article 27 in unison with the rotation of the shaft 10. The function of the partingblade 44 is to separate the severed edges of the trimmed portion of the neck of the article and slightly raise the cut edges of the material of the neck from the form on which it has been made. a

It will be pointed out that the lever 43 during the operation of the parting knife 4A to the article is held between the guides 52 comparatively loosely so as to permit the operator to use some discretion in the manipulation thereof. If the operator de- .bead-r"ollingtool mounted o sire the lever A 43 'may'be moved slightly the lever43 is raised andjthe handle 46' bearing the roller 47 is swung down between the guides'52- to permit the rapidly revolving roller 47 to engage the severed and upturned edgeofjthe article, result 'of which is that a head on the article is rapidly rolled up-by engagement with the roller 47.

When the roller 47 is not in'use; it is raised upwardly and the handle Lois supported out of the way in a con the supporting hook 53. claim: i 1. The combination in a bead-forming machine embodying a rotatable article supporting member, of a trimming tool adapted v to be brought into engagement with the open end of said article for trimming the latter, a vibratory carrying tool adapted to engage the article in the cut made by said trimming-tool for loosening the edges of said article from said form, and a beadrolling mechanism for rolling up a bead on said article.

2. A bead-forming machine comprising a suitably-rotated article-carrying member, a

longitudinally-shiftablecarriage adjacent to said member, a shaft arranged transversely. of the axis of rotation of said member, a combined parting and bead-forming tool, means for transmitting vibratory motion from said transverse shaft to said tool for rolling up a bead on said article.

3. A bead-forming machine comprising a suitably-rotated article-carrying member, a carriage mounted adjacent to said articlecarrying member; said carriage being shiftable longitudinally with respect to said artlcle, a trimming-tool carried by said carriage, and a combined vibratory parting and bead-rolling tool mounted on'said carriage.

4 A bead-forming machi'ne-comprismg a suitably-rotated article-carrymg member, a carriage mounted adjacent to said artlclecarrying member, said carriage being shiftable longitudinally with respect to said article, a trimming-tool carried by said carriage, a combined vibratory partlng nd said carriage, and guiding means for said tool during its engagement with said article.

5. A bead-forming machine compr1s1n a rotatable shaft, an article-carrying mem er on said shaft, a carriage shiftably mounted with respect to said shaft, a combined parting and bead-forming member mounted on said carriage, and means for imparting a vibratory movement to said forming-memher during its application to the article.

venient position in its rotation.

7. A bead-forming machine embodying a rotatable article-holding member, and a bead-forming tool applicable to the open end of said article during its rotation, and f my hand in presence of two subscribing witmeans for vibrating said tool longitudinally of the axis of said article duringrits application thereto.

8. ,A bead-formin machine embodying an article holding mem er, and a non-revoluble bead-forming tool capable of rapid lateral vibration during its application to the open end of said article.

9. A bead-forming machine embodying a rotatable article-holding member, and anonrevoluble tool applicable to the open end of said article during its rotation, said tool vibrating longitudinally of the axis of said article during its applicaton thereto.

In testimony whereof I have hereunto setnesses. I r

= JQHNW. DENMEAD. Witnesses:

- C. E. Hummer,

A. L. MoCLINTooK. 

